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microtubule

Pronunciation: mi'kro-tu'byul

Definition: A hollow, cylindric cytoplasmic element, 25 nm in diameter and of variable length, that occurs widely in the cytoskeleton, cilia, and flagella of cells; microtubules play a role in the maintenance of cell shape and increase in number during mitosis and meiosis, in which they are related to movement of the chromosomes by the nuclear spindle.

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© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.
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